Bug 499478

Summary:	Brightness control missing from Brightness and Color widget
Product:	[Plasma] plasmashell	Reporter:	steve <scalvin>
Component:	Brightness and Color widget	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	h4yabu5a, justin, natalie_clarius
Priority:	NOR
Version First Reported In:	git-stable-Plasma/6.2
Target Milestone:	1.0
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description steve 2025-02-03 20:12:00 UTC

SUMMARY
No brightness control in Brightness and Control Widget.

STEPS TO REPRODUCE
1. Open widget.
2. 
3. 

OBSERVED RESULT
No brightness control, only Nightlight suspend option available.

EXPECTED RESULT
A brightness adjustment slider would be present to change brightness levels.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: Arcolinux Kernel: 6.12.10-arch1-1 (64-bit)
KDE Plasma Version: 6.2.5
KDE Frameworks Version: 6.10.0
Qt Version: 6.8.2

ADDITIONAL INFORMATION
This widget did work, so looks like a regression.

Comment 1 h4yabu5a 2025-02-04 06:34:22 UTC

I'm currently observing a similar behavior where after logging into KDE Plasma 6.2.5 the brightness adjustment slider is present and functional but after some time just disappears for no apparent reason. After logging out and logging on it's there again.

Also, if the slider has disappeared and under display configuration HDR is enabled, it appears again. By disabling HDR the slider is gone again.

Comment 2 Justin Zobel 2025-02-05 11:39:18 UTC

Can you check if the backlight is detected?

Open up a terminal and show the output of "ls -l /sys/class/backlight"

Comment 3 Justin Zobel 2025-02-06 07:14:03 UTC

Changing status.

Comment 4 Bug Janitor Service 2025-02-21 03:46:49 UTC

🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

Thank you for helping us make KDE software even better for everyone!

Comment 5 Bug Janitor Service 2025-03-08 03:52:29 UTC

🐛🧹 This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.